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Summary: Methods

# AccessibilityEventSource

`public interface AccessibilityEventSource`
``

android.view.accessibility.AccessibilityEventSource

Known indirect subclasses AbsListView, AbsSeekBar, AbsSpinner, AbsoluteLayout, ActionMenuView, AdapterView<T extends Adapter>, AdapterViewAnimator, AdapterViewFlipper, AnalogClock, AppWidgetHostView, AutoCompleteTextView, Button, CalendarView, CheckBox, CheckedTextView, and 65 others.
AbsListView | Base class that can be used to implement virtualized lists of items.
AbsSeekBar | AbsSeekBar extends the capabilities of ProgressBar by adding a draggable thumb.
AbsSpinner | An abstract base class for spinner widgets.
AbsoluteLayout | This class is deprecated. Use `FrameLayout`, `RelativeLayout` or a custom layout instead.
ActionMenuView | ActionMenuView is a presentation of a series of menu options as a View.
AdapterView<T extends Adapter> | An AdapterView is a view whose children are determined by an `Adapter`.
AdapterViewAnimator | Base class for a `AdapterView` that will perform animations when switching between its views.
AdapterViewFlipper | Simple `ViewAnimator` that will animate between two or more views that have been added to it.
AnalogClock | This class is deprecated. This widget is no longer supported.
AppWidgetHostView | Provides the glue to show AppWidget views.
AutoCompleteTextView | An editable text view that shows completion suggestions automatically while the user is typing.
Button | A user interface element the user can tap or click to perform an action.
CalendarView | This class is a calendar widget for displaying and selecting dates.
CheckBox | A checkbox is a specific type of two-states button that can be either checked or unchecked.
CheckedTextView | An extension to `TextView` that supports the `Checkable` interface and displays.
Chronometer | Class that implements a simple timer.
CompoundButton | A button with two states, checked and unchecked.
DatePicker | Provides a widget for selecting a date.
DialerFilter | This class is deprecated. Use a custom view or layout to handle this functionality instead
DigitalClock | This class is deprecated. It is recommended you use `TextClock` instead.
EditText | A user interface element for entering and modifying text.
ExpandableListView | A view that shows items in a vertically scrolling two-level list.
ExtractEditText | Specialization of `EditText` for showing and interacting with the extracted text in a full-screen input method.
FragmentBreadCrumbs | This class is deprecated. This widget is no longer supported.
FrameLayout | FrameLayout is designed to block out an area on the screen to display a single item.
GLSurfaceView | An implementation of SurfaceView that uses the dedicated surface for displaying OpenGL rendering.
Gallery | This class is deprecated. This widget is no longer supported. Other horizontally scrolling widgets include `HorizontalScrollView` and `ViewPager` from the support library.
GestureOverlayView | A transparent overlay for gesture input that can be placed on top of other widgets or contain other widgets.
GridLayout | A layout that places its children in a rectangular grid.
GridView | A view that shows items in two-dimensional scrolling grid.
HorizontalScrollView | Layout container for a view hierarchy that can be scrolled by the user, allowing it to be larger than the physical display.
ImageButton | Displays a button with an image (instead of text) that can be pressed or clicked by the user.
ImageSwitcher | `ViewSwitcher` that switches between two ImageViews when a new image is set on it.
ImageView | Displays image resources, for example `Bitmap` or `Drawable` resources.
InlineContentView | This class represents a view that holds opaque content from another app that you can inline in your UI.
KeyboardView | This class is deprecated. This class is deprecated because this is just a convenient UI widget class that application developers can re-implement on top of existing public APIs. If you have already depended on this class, consider copying the implementation from AOSP into your project or re-implementing a similar widget by yourselves
LinearLayout | A layout that arranges other views either horizontally in a single column or vertically in a single row.
ListView | Displays a vertically-scrollable collection of views, where each view is positioned immediatelybelow the previous view in the list.
MediaController | A view containing controls for a MediaPlayer.
MediaRouteButton |
MultiAutoCompleteTextView | An editable text view, extending `AutoCompleteTextView`, that can show completion suggestions for the substring of the text where the user is typing instead of necessarily for the entire thing.
NumberPicker | A widget that enables the user to select a number from a predefined range.
ProgressBar | A user interface element that indicates the progress of an operation.
QuickContactBadge | Widget used to show an image with the standard QuickContact badge and on-click behavior.
RadioButton | A radio button is a two-states button that can be either checked or unchecked.
RadioGroup | This class is used to create a multiple-exclusion scope for a set of radio buttons.
RatingBar | A RatingBar is an extension of SeekBar and ProgressBar that shows a rating in stars.
RelativeLayout | A Layout where the positions of the children can be described in relation to each other or to the parent.
ScrollView | A view group that allows the view hierarchy placed within it to be scrolled.
SearchView | A widget that provides a user interface for the user to enter a search query and submit a request to a search provider.
SeekBar | A SeekBar is an extension of ProgressBar that adds a draggable thumb.
SlidingDrawer | This class is deprecated. This class is not supported anymore. It is recommended you base your own implementation on the source code for the Android Open Source Project if you must use it in your application.
Space | Space is a lightweight View subclass that may be used to create gaps between components in general purpose layouts.
Spinner | A view that displays one child at a time and lets the user pick among them.
StackView |
SurfaceView | Provides a dedicated drawing surface embedded inside of a view hierarchy.
Switch | A Switch is a two-state toggle switch widget that can select between two options.
TabHost | This class is deprecated. new applications should use fragment APIs instead of this class: Use TabLayout and ViewPager instead.
TabWidget | This class is deprecated. new applications should use fragment APIs instead of this class: Use TabLayout and ViewPager instead.
TableLayout | A layout that arranges its children into rows and columns.
TableRow | A layout that arranges its children horizontally.
TextClock | `TextClock` can display the current date and/or time as a formatted string.
TextSwitcher | Specialized `ViewSwitcher` that contains only children of type `TextView`.
TextView | A user interface element that displays text to the user.
TextureView | A TextureView can be used to display a content stream.
TimePicker | A widget for selecting the time of day, in either 24-hour or AM/PM mode.
ToggleButton | Displays checked/unchecked states as a button with a "light" indicator and by default accompanied with the text "ON" or "OFF".
Toolbar | A standard toolbar for use within application content.
TvView | Displays TV contents.
TwoLineListItem | This class is deprecated. This class can be implemented easily by apps using a `RelativeLayout` or a `LinearLayout`.
VideoView | Displays a video file.
View | This class represents the basic building block for user interface components.
ViewAnimator | Base class for a `FrameLayout` container that will perform animations when switching between its views.
ViewFlipper | Simple `ViewAnimator` that will animate between two or more views that have been added to it.
ViewGroup | A `ViewGroup` is a special view that can contain other views (called children.) The view group is the base class for layouts and views containers.
ViewStub | A ViewStub is an invisible, zero-sized View that can be used to lazily inflate layout resources at runtime.
ViewSwitcher | `ViewAnimator` that switches between two views, and has a factory from which these views are created.
WebView | A View that displays web pages.
ZoomButton | This class is deprecated. Use other means to handle this functionality. This widget is merely a simple wrapper around a long-press handler.
ZoomControls | This class is deprecated. This functionality and UI is better handled with custom views and layouts rather than a dedicated zoom-control widget

This interface is implemented by classes source of `AccessibilityEvent`s.

### Developer Guides

For more information about making applications accessible, read the Accessibility developer guide.

## Summary

### Public methods
`abstract void` | `sendAccessibilityEvent(int eventType)` Handles the request for sending an `AccessibilityEvent` given the event type.
`abstract void` | `sendAccessibilityEventUnchecked(AccessibilityEvent event)` Handles the request for sending an `AccessibilityEvent`.

## Public methods

### sendAccessibilityEvent

    public abstract void sendAccessibilityEvent (int eventType)

Handles the request for sending an `AccessibilityEvent` given the event type. The method must first check if accessibility is on via calling `AccessibilityManager#isEnabled()`, obtain an `AccessibilityEvent` from the event pool through calling `AccessibilityEvent#obtain(int)`, populate the event, and send it for dispatch via calling `AccessibilityManager#sendAccessibilityEvent(AccessibilityEvent)`.

Parameters
`eventType` | `int`: The event type.

See also:

- `AccessibilityEvent`
- `AccessibilityManager`

### sendAccessibilityEventUnchecked

    public abstract void sendAccessibilityEventUnchecked (AccessibilityEvent event)

Handles the request for sending an `AccessibilityEvent`. The method does not guarantee to check if accessibility is on before sending the event for dispatch. It is responsibility of the caller to do the check via calling `AccessibilityManager#isEnabled()`.

Parameters
`event` | `AccessibilityEvent`: The event.

See also:

- `AccessibilityEvent`
- `AccessibilityManager`

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